---
title: "What Is DE filter? Pool Glossary | Marina Pool Services"
description: "A DE filter uses diatomaceous earth powder to catch very fine particles. Plain-English pool glossary from Marina Pool Services in Grapevine, TX."
url: https://marinapool.multisites.ai/glossary/de-filter
publisher: Marina Pool Services
phone: +1-817-896-1120
quote: https://marinapool.multisites.ai/contact
---

Equipment

# DE filter

A DE filter uses diatomaceous earth powder to catch very fine particles.

A DE filter has the finest filtration of the three types. Powder coats grids inside the tank and traps tiny particles. Water comes out very clear.

It takes more care. After each backwash, you must add fresh powder through the skimmer. The powder dust is a breathing hazard, so wear a mask and follow the label. Check [grids](https://marinapool.multisites.ai/glossary/filter-grids) for tears, which let powder blow back into the pool. A pro can inspect the grids and repair the tank. See [backwash](https://marinapool.multisites.ai/glossary/backwash) for how cleaning works.

[Marina can helpPool Filter Service & Installation](https://marinapool.multisites.ai/our-services/pool-filter-repair)

## Related terms

-   [Pool filter](https://marinapool.multisites.ai/glossary/pool-filter)
-   [Filter grids](https://marinapool.multisites.ai/glossary/filter-grids)
-   [Backwash](https://marinapool.multisites.ai/glossary/backwash)
-   [Multiport valve](https://marinapool.multisites.ai/glossary/multiport-valve)

## Need a hand with your pool?

Call or text and tell us what your pool needs. Estimates are free for qualifying services, and same-day estimates are possible when the schedule allows.

[Call (817) 896-1120](tel:+1-817-896-1120)[Get a quote](https://marinapool.multisites.ai/contact)

![A pool technician working on an equipment pad](https://marinapool.multisites.ai/_astro/technician-equipment-pad.BW5xZMNY_Zum1K5.webp)